<?php
//原作者：epsilon7

//SonyMusic(sonymusic@163.net)

class browser_detector {

	var $UA = ""; //$HTTP_USER_AGENT的内容
	var $BROWSER= "Unknown"; //浏览器类型
	var $PLATFORM = "Unknown"; //操作系统
	var $VERSION= ""; //浏览器版本号
	var $MAJORVER = ""; //浏览器主版本号
	var $MINORVER = ""; //浏览器副版本号

	/* 构造函数开始 */
	function __construct(){ 
		$this->UA = getenv('HTTP_USER_AGENT'); 
		$preparens = ""; 
		$parens = ""; 

		$i = strpos($this->UA,"("); 
		if ($i >= 0) { 
			$preparens = trim(substr($this->UA,0,$i)); 
			$parens = substr($this->UA,$i+1,strlen($this->UA)); 
			$j = strpos($parens,")"); 
			if($j>=0) { 
				$parens = substr($parens,0,$j); 
			} 
		}else { 
	 		$preparens = $this->UA; 
	 	} 

		$browVer = $preparens; 
		$token = trim(strtok($parens,";")); 
		while($token) { 
			if($token=="compatible") {
			}elseif(preg_match("/MSIE/i","$token")){ 
				$browVer = $token; 
			}elseif(preg_match("/Opera/i","$token")) {
				$browVer = $token; 
			}elseif(preg_match("/X11/i","$token") || preg_match("/SunOS/i","$token") || preg_match ("/linux/i","$token")) { 
				$this->PLATFORM = "unix"; 
			}elseif(preg_match("/Win/i","$token")) { 
				$this->PLATFORM = $token; 
			}elseif(preg_match("/Mac/i","$token") || preg_match("/PPC/i","$token")) { 
				$this->PLATFORM = $token; 
			} 
			$token = strtok(";"); 
		}
		$msieIndex = strpos($browVer,"MSIE"); 
		if($msieIndex >= 0) { 
			$browVer = substr($browVer,$msieIndex,strlen($browVer)); 
		} 
		$leftover = ""; 
		if(substr($browVer,0,strlen("Mozilla")) == "Mozilla") { 
			$this->BROWSER = "Netscape"; 
			$leftover=substr($browVer,strlen("Mozilla")+1,strlen($browVer)); 
		}elseif(substr($browVer,0,strlen("Lynx")) == "Lynx") { 
			$this->BROWSER = "Lynx"; 
			$leftover=substr($browVer,strlen("Lynx")+1,strlen($browVer)); 
		}elseif(substr($browVer,0,strlen("MSIE")) == "MSIE") { 
			$this->BROWSER = "IE"; 
			$leftover=substr($browVer,strlen("MSIE")+1,strlen($browVer)); 
		}elseif(substr($browVer,0,strlen("Microsoft Internet Explorer")) == "Microsoft Internet Explorer") { 
			$this->BROWSER = "IE"; 
			$leftover=substr($browVer,strlen("Microsoft Internet Explorer")+1,strlen($browVer)); 
		}elseif(substr($browVer,0,strlen("Opera")) == "Opera") { 
			$this->BROWSER = "Opera"; 
			$leftover=substr($browVer,strlen("Opera")+1,strlen($browVer)); 
		}
		$leftover = trim($leftover); 
		$i=strpos($leftover," "); 
		if($i > 0) { 
			$this->VERSION = substr($leftover,0,$i); 
		}else { 
			$this->VERSION = $leftover; 
		} 
		$j = strpos($this->VERSION,"."); 
		if($j >= 0) { 
			$this->MAJORVER = substr($this->VERSION,0,$j); 
			$this->MINORVER = substr($this->VERSION,$j+1,strlen($this->VERSION)); 
		}else { 
			$this->MAJORVER = $this->VERSION; 
		}
	}
}
//测试程序开始
/*
$test=new browser_detector;
echo $test->UA."<br/>";
echo $test->BROWSER."<br/>";
echo $test->PLATFORM."<br/>";
echo $test->VERSION."<br/>";
echo $test->MAJORVER."<br/>";
echo $test->MINORVER."<br/>";
*/

?>